“There’s really only about 25 of us doing this,” Steve Milloy says, shortly after sitting down at Morton’s, a Washington, D.C., steakhouse favored by lawyers and lobbyists. “A core group of skeptics. It’s a ragtag bunch, very Continental Army.” Milloy, a Fox News commentator and former tobacco-industry advocate, runs a website called JunkScience.com that is an outlet for attacks on those he calls “global-warming alarmists.” Many of those who question mainstream climate science resent being called deniers; they say it unfairly equates them with Holocaust deniers. They prefer doubters, skeptics or realists. “Me, I just stick with denier,” Milloy says. “I’m happy to be a denier.”

Milloy is dressed in a striped pink button-down shirt and khaki pants, classic Potomac prep. He moved into climate denial in the 1990s as funding from the tobacco lobby began to dry up. At the time, conservative and libertarian think tanks were just starting to take aim at climate science. Milloy, who has received funding from entities controlled by oil billionaires Charles and David Koch, helps them get their message to the masses.